Leviticus 10:9

Drink neither wine nor anything that maketh drunk, neither thou nor thy sons with thee at the time when ye are to enter into the tabernacle of ordinance, as thy sons did who have died by the burning of fire. It is an everlasting statute for your generations;

or strong drink which is made from certain kinds of grain, or honey, or dates. Wine destroys the understanding of him who drinks it, and he becomes mixed-up. You are the High Priest, and you must be able to distinguish between holy places and unholy places (“unholy” [Hebrew: ḥol] comes from the word “profane” [Hebrew: ḥillul]), as well as between holy days and unholy days.

DRINK NO WINE NOR STRONG DRINK. “[Do not drink] wine to such an extent that it has an intoxicating effect.” This is Rashi’s language. The meaning thereof is that if he paused during the drinking [of a fourth of a log of wine], or if he mixed a little water into it, he is free from punishment. The opinion of the Rabbi [Rashi] is thus that the priests were only prohibited from drinking wine, but not from other intoxicating drinks, the meaning of the term sheichar (strong drink) mentioned here being derived from the law of the Nazirite [where a similar expression appears, (strong drink) (Numbers 6:3). and only wine is forbidden to him]. must not therefore be understood as strong drink [as it is found in all English translations], but rather as “strong wine.” The vav in the Hebrew yayin v’sheichar (literally: “wine and strong wine”) is thus to be understood as if it said yayin k’shehu sheichar — you must not drink “wine when it is strong wine,” or “when it is intoxicating” (Mizrachi). Rambam’s opinion, however, as mentioned further on in the text, is that sheichar means “strong drink,” and the priests were warned against both — wine and strong drink, although the punishment for violation was different for each. This is correct according to my opinion. But in the opinion of Rabbi Moshe [ben Maimon], 1:2. however, other intoxicating drinks are prohibited [through a negative commandment, without being punishable by death, and the Service performed after drinking them is not invalidated, whereas for drinking wine the punishment is death by the hand of Heaven, and the Service is invalidated]; thus sheichar is to be understood in its plain sense [i.e., strong drink]. The reason why this commandment was given at that time, was in order that the priest should not go astray through the intoxicating effect of wine, and thus come to entertain some improper thought which might cause his death, as happened to [Aaron’s] sons. It is possible that when the Rabbis interpreted that Nadab and Abihu died because they entered the Sanctuary whilst intoxicated by wine, they meant to say that it was because of the wine they had drunk that they erred in the matter of the strange fire, but not that their punishment actually was because they had drunk the wine, since they had not yet been warned against it. Rather, their punishment was because they erred with respect to the fire of G-d, as I have alluded to.

יין ושכר אל תשת, “do not drink wine or other intoxicating drinks;” this commandment applies when on that day the priest is called upon to perform service in the Temple. Seeing that the High Priest is called upon to do so daily or at least to be ready to do so daily, it is addressed here to him in the singular mode. It is a cautionary commandment, to protect him against becoming inebriated. We know that normally there are many occasions when the consumption of wine is not prohibited, but is part and parcel of our rituals, and the priests are included in this also. We know already from Noah’s experience how overindulgence in alcoholic drink can cause man to lose his dignity not only temporarily but permanently. Solomon, in Proverbs 23,29-31 dwells on the manifold evils that can beset anyone who drinks to excess, so much so that the red colour of wine is used by him as a symbol of blood, i.e. bloodshed, that can be the result of drunkenness. Solomon continues with: כי יתן בכוס עינו יתהלך במישרים, “only he who will look at the cup will walk upright.” This sounds somewhat peculiar at first glance until we notice that the word כוס for “cup” is misspelled as if it were referring to כיס, ”pocket.” What Solomon means is that drinking too much may result in the drunk becoming a thief, desirous of obtaining by illegal means what is in someone else’s pocket. This is why he continues with: אחריתו כנחש נחש וכצפעני יפרש, “in the end it bites like a snake and stings like a viper.” He who aims at illegal gain will wind up walking upright, as he will have lost what was rightfully his and therefore can walk upright having nothing to carry that would force him to stoop under its weight. Some commentators understand the comparison Solomon makes with the snake as referring to the original serpent, and they explain Adam’s having drunk too much wine when celebrating his nuptials as the cause of his eating from the tree of knowledge as the result of his having been drunk. They suggest that the word כנחש be read as בנחש, that Adam transgressed the Lord’s commandment as he too had been seduced by the snake by means of drinking too much wine. Eventually he had become cursed through the serpent. (Proverbs 23,32.) This is what the Torah meant when it wrote in Genesis 3,15: ואתה תשופנו עקב, “and you shall bruise its heel.” Seeing that wine had become the means through which man had been led into sin, when we use wine at joyous occasions, we do so after taking permission to do so from …